4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define DEBUG_SUBSYSTEM S_RPC
38 #include <obd_support.h>
39 #include <lustre_net.h>
40 #include <lustre_lib.h>
42 #include <obd_class.h>
43 #include "ptlrpc_internal.h"
46 * Helper function. Sends \a len bytes from \a base at offset \a offset
47 * over \a conn connection to portal \a portal.
48 * Returns 0 on success or error code.
50 static int ptl_send_buf (lnet_handle_md_t *mdh, void *base, int len,
51 lnet_ack_req_t ack, struct ptlrpc_cb_id *cbid,
52 struct ptlrpc_connection *conn, int portal, __u64 xid,
58 LASSERT (portal != 0);
59 LASSERT (conn != NULL);
60 CDEBUG (D_INFO, "conn=%p id %s\n", conn, libcfs_id2str(conn->c_peer));
63 md.threshold = (ack == LNET_ACK_REQ) ? 2 : 1;
64 md.options = PTLRPC_MD_OPTIONS;
66 md.eq_handle = ptlrpc_eq_h;
68 if (unlikely(ack == LNET_ACK_REQ &&
69 OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_ACK, OBD_FAIL_ONCE))){
70 /* don't ask for the ack to simulate failing client */
74 rc = LNetMDBind (md, LNET_UNLINK, mdh);
75 if (unlikely(rc != 0)) {
76 CERROR ("LNetMDBind failed: %d\n", rc);
77 LASSERT (rc == -ENOMEM);
81 CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64", offset %u\n",
82 len, portal, xid, offset);
84 rc = LNetPut (conn->c_self, *mdh, ack,
85 conn->c_peer, portal, xid, offset, 0);
86 if (unlikely(rc != 0)) {
88 /* We're going to get an UNLINK event when I unlink below,
89 * which will complete just like any other failed send, so
90 * I fall through and return success here! */
91 CERROR("LNetPut(%s, %d, "LPD64") failed: %d\n",
92 libcfs_id2str(conn->c_peer), portal, xid, rc);
93 rc2 = LNetMDUnlink(*mdh);
94 LASSERTF(rc2 == 0, "rc2 = %d\n", rc2);
100 static void mdunlink_iterate_helper(lnet_handle_md_t *bd_mds, int count)
104 for (i = 0; i < count; i++)
105 LNetMDUnlink(bd_mds[i]);
110 * Register bulk at the sender for later transfer.
111 * Returns 0 on success or error code.
113 int ptlrpc_register_bulk(struct ptlrpc_request *req)
115 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
116 lnet_process_id_t peer;
122 lnet_handle_me_t me_h;
125 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_GET_NET))
128 /* NB no locking required until desc is on the network */
129 LASSERT(desc->bd_nob > 0);
130 LASSERT(desc->bd_md_count == 0);
131 LASSERT(desc->bd_md_max_brw <= PTLRPC_BULK_OPS_COUNT);
132 LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
133 LASSERT(desc->bd_req != NULL);
134 LASSERT(desc->bd_type == BULK_PUT_SINK ||
135 desc->bd_type == BULK_GET_SOURCE);
137 /* cleanup the state of the bulk for it will be reused */
138 if (req->rq_resend || req->rq_send_state == LUSTRE_IMP_REPLAY)
139 desc->bd_nob_transferred = 0;
141 LASSERT(desc->bd_nob_transferred == 0);
143 desc->bd_failure = 0;
145 peer = desc->bd_import->imp_connection->c_peer;
147 LASSERT(desc->bd_cbid.cbid_fn == client_bulk_callback);
148 LASSERT(desc->bd_cbid.cbid_arg == desc);
150 /* An XID is only used for a single request from the client.
151 * For retried bulk transfers, a new XID will be allocated in
152 * in ptlrpc_check_set() if it needs to be resent, so it is not
153 * using the same RDMA match bits after an error.
155 * For multi-bulk RPCs, rq_xid is the last XID needed for bulks. The
156 * first bulk XID is power-of-two aligned before rq_xid. LU-1431 */
157 xid = req->rq_xid & ~((__u64)desc->bd_md_max_brw - 1);
158 LASSERTF(!(desc->bd_registered &&
159 req->rq_send_state != LUSTRE_IMP_REPLAY) ||
160 xid != desc->bd_last_xid,
161 "registered: %d rq_xid: "LPU64" bd_last_xid: "LPU64"\n",
162 desc->bd_registered, xid, desc->bd_last_xid);
164 total_md = (desc->bd_iov_count + LNET_MAX_IOV - 1) / LNET_MAX_IOV;
165 desc->bd_registered = 1;
166 desc->bd_last_xid = xid;
167 desc->bd_md_count = total_md;
168 md.user_ptr = &desc->bd_cbid;
169 md.eq_handle = ptlrpc_eq_h;
170 md.threshold = 1; /* PUT or GET */
172 for (posted_md = 0; posted_md < total_md; posted_md++, xid++) {
173 md.options = PTLRPC_MD_OPTIONS |
174 ((desc->bd_type == BULK_GET_SOURCE) ?
175 LNET_MD_OP_GET : LNET_MD_OP_PUT);
176 ptlrpc_fill_bulk_md(&md, desc, posted_md);
178 rc = LNetMEAttach(desc->bd_portal, peer, xid, 0,
179 LNET_UNLINK, LNET_INS_AFTER, &me_h);
181 CERROR("%s: LNetMEAttach failed x"LPU64"/%d: rc = %d\n",
182 desc->bd_export->exp_obd->obd_name, xid,
187 /* About to let the network at it... */
188 rc = LNetMDAttach(me_h, md, LNET_UNLINK,
189 &desc->bd_mds[posted_md]);
191 CERROR("%s: LNetMDAttach failed x"LPU64"/%d: rc = %d\n",
192 desc->bd_export->exp_obd->obd_name, xid,
194 rc2 = LNetMEUnlink(me_h);
201 LASSERT(rc == -ENOMEM);
202 spin_lock(&desc->bd_lock);
203 desc->bd_md_count -= total_md - posted_md;
204 spin_unlock(&desc->bd_lock);
205 LASSERT(desc->bd_md_count >= 0);
206 mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw);
207 req->rq_status = -ENOMEM;
211 /* Set rq_xid to matchbits of the final bulk so that server can
212 * infer the number of bulks that were prepared */
214 LASSERTF(desc->bd_last_xid == (req->rq_xid & PTLRPC_BULK_OPS_MASK),
215 "bd_last_xid = x"LPU64", rq_xid = x"LPU64"\n",
216 desc->bd_last_xid, req->rq_xid);
218 spin_lock(&desc->bd_lock);
219 /* Holler if peer manages to touch buffers before he knows the xid */
220 if (desc->bd_md_count != total_md)
221 CWARN("%s: Peer %s touched %d buffers while I registered\n",
222 desc->bd_export->exp_obd->obd_name, libcfs_id2str(peer),
223 total_md - desc->bd_md_count);
224 spin_unlock(&desc->bd_lock);
226 CDEBUG(D_NET, "Setup %u bulk %s buffers: %u pages %u bytes, "
227 "xid x"LPX64"-"LPX64", portal %u\n", desc->bd_md_count,
228 desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
229 desc->bd_iov_count, desc->bd_nob,
230 desc->bd_last_xid, req->rq_xid, desc->bd_portal);
234 EXPORT_SYMBOL(ptlrpc_register_bulk);
237 * Disconnect a bulk desc from the network. Idempotent. Not
238 * thread-safe (i.e. only interlocks with completion callback).
239 * Returns 1 on success or 0 if network unregistration failed for whatever
242 int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async)
244 struct ptlrpc_bulk_desc *desc = req->rq_bulk;
245 wait_queue_head_t *wq;
246 struct l_wait_info lwi;
249 LASSERT(!in_interrupt()); /* might sleep */
251 /* Let's setup deadline for reply unlink. */
252 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
253 async && req->rq_bulk_deadline == 0)
254 req->rq_bulk_deadline = cfs_time_current_sec() + LONG_UNLINK;
256 if (ptlrpc_client_bulk_active(req) == 0) /* completed or */
257 return 1; /* never registered */
259 LASSERT(desc->bd_req == req); /* bd_req NULL until registered */
261 /* the unlink ensures the callback happens ASAP and is the last
262 * one. If it fails, it must be because completion just happened,
263 * but we must still l_wait_event() in this case to give liblustre
264 * a chance to run client_bulk_callback() */
265 mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw);
267 if (ptlrpc_client_bulk_active(req) == 0) /* completed or */
268 return 1; /* never registered */
270 /* Move to "Unregistering" phase as bulk was not unlinked yet. */
271 ptlrpc_rqphase_move(req, RQ_PHASE_UNREGISTERING);
273 /* Do not wait for unlink to finish. */
277 if (req->rq_set != NULL)
278 wq = &req->rq_set->set_waitq;
280 wq = &req->rq_reply_waitq;
283 /* Network access will complete in finite time but the HUGE
284 * timeout lets us CWARN for visibility of sluggish NALs */
285 lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK),
286 cfs_time_seconds(1), NULL, NULL);
287 rc = l_wait_event(*wq, !ptlrpc_client_bulk_active(req), &lwi);
289 ptlrpc_rqphase_move(req, req->rq_next_phase);
293 LASSERT(rc == -ETIMEDOUT);
294 DEBUG_REQ(D_WARNING, req, "Unexpectedly long timeout: desc %p",
299 EXPORT_SYMBOL(ptlrpc_unregister_bulk);
301 static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags)
303 struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
304 struct ptlrpc_service *svc = svcpt->scp_service;
305 int service_time = max_t(int, cfs_time_current_sec() -
306 req->rq_arrival_time.tv_sec, 1);
308 if (!(flags & PTLRPC_REPLY_EARLY) &&
309 (req->rq_type != PTL_RPC_MSG_ERR) &&
310 (req->rq_reqmsg != NULL) &&
311 !(lustre_msg_get_flags(req->rq_reqmsg) &
312 (MSG_RESENT | MSG_REPLAY |
313 MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE))) {
314 /* early replies, errors and recovery requests don't count
315 * toward our service time estimate */
316 int oldse = at_measured(&svcpt->scp_at_estimate, service_time);
319 DEBUG_REQ(D_ADAPTTO, req,
320 "svc %s changed estimate from %d to %d",
321 svc->srv_name, oldse,
322 at_get(&svcpt->scp_at_estimate));
325 /* Report actual service time for client latency calc */
326 lustre_msg_set_service_time(req->rq_repmsg, service_time);
327 /* Report service time estimate for future client reqs, but report 0
328 * (to be ignored by client) if it's a error reply during recovery.
330 if (req->rq_type == PTL_RPC_MSG_ERR &&
331 (req->rq_export == NULL || req->rq_export->exp_obd->obd_recovering))
332 lustre_msg_set_timeout(req->rq_repmsg, 0);
334 lustre_msg_set_timeout(req->rq_repmsg,
335 at_get(&svcpt->scp_at_estimate));
337 if (req->rq_reqmsg &&
338 !(lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) {
339 CDEBUG(D_ADAPTTO, "No early reply support: flags=%#x "
340 "req_flags=%#x magic=%d:%x/%x len=%d\n",
341 flags, lustre_msg_get_flags(req->rq_reqmsg),
342 lustre_msg_is_v1(req->rq_reqmsg),
343 lustre_msg_get_magic(req->rq_reqmsg),
344 lustre_msg_get_magic(req->rq_repmsg), req->rq_replen);
349 * Send request reply from request \a req reply buffer.
350 * \a flags defines reply types
351 * Returns 0 on sucess or error code
353 int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
355 struct ptlrpc_reply_state *rs = req->rq_reply_state;
356 struct ptlrpc_connection *conn;
359 /* We must already have a reply buffer (only ptlrpc_error() may be
360 * called without one). The reply generated by sptlrpc layer (e.g.
361 * error notify, etc.) might have NULL rq->reqmsg; Otherwise we must
362 * have a request buffer which is either the actual (swabbed) incoming
363 * request, or a saved copy if this is a req saved in
364 * target_queue_final_reply().
366 LASSERT (req->rq_no_reply == 0);
367 LASSERT (req->rq_reqbuf != NULL);
368 LASSERT (rs != NULL);
369 LASSERT ((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult);
370 LASSERT (req->rq_repmsg != NULL);
371 LASSERT (req->rq_repmsg == rs->rs_msg);
372 LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
373 LASSERT (rs->rs_cb_id.cbid_arg == rs);
375 /* There may be no rq_export during failover */
377 if (unlikely(req->rq_export && req->rq_export->exp_obd &&
378 req->rq_export->exp_obd->obd_fail)) {
379 /* Failed obd's only send ENODEV */
380 req->rq_type = PTL_RPC_MSG_ERR;
381 req->rq_status = -ENODEV;
382 CDEBUG(D_HA, "sending ENODEV from failed obd %d\n",
383 req->rq_export->exp_obd->obd_minor);
386 /* In order to keep interoprability with the client (< 2.3) which
387 * doesn't have pb_jobid in ptlrpc_body, We have to shrink the
388 * ptlrpc_body in reply buffer to ptlrpc_body_v2, otherwise, the
389 * reply buffer on client will be overflow.
391 * XXX Remove this whenver we drop the interoprability with such client.
393 req->rq_replen = lustre_shrink_msg(req->rq_repmsg, 0,
394 sizeof(struct ptlrpc_body_v2), 1);
396 if (req->rq_type != PTL_RPC_MSG_ERR)
397 req->rq_type = PTL_RPC_MSG_REPLY;
399 lustre_msg_set_type(req->rq_repmsg, req->rq_type);
400 lustre_msg_set_status(req->rq_repmsg,
401 ptlrpc_status_hton(req->rq_status));
402 lustre_msg_set_opc(req->rq_repmsg,
403 req->rq_reqmsg ? lustre_msg_get_opc(req->rq_reqmsg) : 0);
405 target_pack_pool_reply(req);
407 ptlrpc_at_set_reply(req, flags);
409 if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
410 conn = ptlrpc_connection_get(req->rq_peer, req->rq_self, NULL);
412 conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
414 if (unlikely(conn == NULL)) {
415 CERROR("not replying on NULL connection\n"); /* bug 9635 */
418 ptlrpc_rs_addref(rs); /* +1 ref for the network */
420 rc = sptlrpc_svc_wrap_reply(req);
424 req->rq_sent = cfs_time_current_sec();
426 rc = ptl_send_buf (&rs->rs_md_h, rs->rs_repbuf, rs->rs_repdata_len,
427 (rs->rs_difficult && !rs->rs_no_ack) ?
428 LNET_ACK_REQ : LNET_NOACK_REQ,
430 ptlrpc_req2svc(req)->srv_rep_portal,
431 req->rq_xid, req->rq_reply_off);
433 if (unlikely(rc != 0))
434 ptlrpc_req_drop_rs(req);
435 ptlrpc_connection_put(conn);
438 EXPORT_SYMBOL(ptlrpc_send_reply);
440 int ptlrpc_reply (struct ptlrpc_request *req)
442 if (req->rq_no_reply)
445 return (ptlrpc_send_reply(req, 0));
447 EXPORT_SYMBOL(ptlrpc_reply);
450 * For request \a req send an error reply back. Create empty
451 * reply buffers if necessary.
453 int ptlrpc_send_error(struct ptlrpc_request *req, int may_be_difficult)
457 if (req->rq_no_reply)
460 if (!req->rq_repmsg) {
461 rc = lustre_pack_reply(req, 1, NULL, NULL);
466 if (req->rq_status != -ENOSPC && req->rq_status != -EACCES &&
467 req->rq_status != -EPERM && req->rq_status != -ENOENT &&
468 req->rq_status != -EINPROGRESS && req->rq_status != -EDQUOT)
469 req->rq_type = PTL_RPC_MSG_ERR;
471 rc = ptlrpc_send_reply(req, may_be_difficult);
474 EXPORT_SYMBOL(ptlrpc_send_error);
476 int ptlrpc_error(struct ptlrpc_request *req)
478 return ptlrpc_send_error(req, 0);
480 EXPORT_SYMBOL(ptlrpc_error);
483 * Send request \a request.
484 * if \a noreply is set, don't expect any reply back and don't set up
486 * Returns 0 on success or error code.
488 int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
493 struct ptlrpc_connection *connection;
494 lnet_handle_me_t reply_me_h;
496 struct obd_device *obd = request->rq_import->imp_obd;
498 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DROP_RPC))
501 LASSERT(request->rq_type == PTL_RPC_MSG_REQUEST);
502 LASSERT(request->rq_wait_ctx == 0);
504 /* If this is a re-transmit, we're required to have disengaged
505 * cleanly from the previous attempt */
506 LASSERT(!request->rq_receiving_reply);
508 if (request->rq_import->imp_obd &&
509 request->rq_import->imp_obd->obd_fail) {
510 CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
511 request->rq_import->imp_obd->obd_name);
512 /* this prevents us from waiting in ptlrpc_queue_wait */
514 request->rq_status = -ENODEV;
518 connection = request->rq_import->imp_connection;
520 lustre_msg_set_handle(request->rq_reqmsg,
521 &request->rq_import->imp_remote_handle);
522 lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST);
523 lustre_msg_set_conn_cnt(request->rq_reqmsg,
524 request->rq_import->imp_conn_cnt);
525 lustre_msghdr_set_flags(request->rq_reqmsg,
526 request->rq_import->imp_msghdr_flags);
528 if (request->rq_resend)
529 lustre_msg_add_flags(request->rq_reqmsg, MSG_RESENT);
531 if (request->rq_memalloc)
532 mpflag = cfs_memory_pressure_get_and_set();
534 rc = sptlrpc_cli_wrap_request(request);
538 /* bulk register should be done after wrap_request() */
539 if (request->rq_bulk != NULL) {
540 rc = ptlrpc_register_bulk (request);
546 LASSERT (request->rq_replen != 0);
547 if (request->rq_repbuf == NULL) {
548 LASSERT(request->rq_repdata == NULL);
549 LASSERT(request->rq_repmsg == NULL);
550 rc = sptlrpc_cli_alloc_repbuf(request,
553 /* this prevents us from looping in
554 * ptlrpc_queue_wait */
556 request->rq_status = rc;
557 GOTO(cleanup_bulk, rc);
560 request->rq_repdata = NULL;
561 request->rq_repmsg = NULL;
564 rc = LNetMEAttach(request->rq_reply_portal,/*XXX FIXME bug 249*/
565 connection->c_peer, request->rq_xid, 0,
566 LNET_UNLINK, LNET_INS_AFTER, &reply_me_h);
568 CERROR("LNetMEAttach failed: %d\n", rc);
569 LASSERT (rc == -ENOMEM);
570 GOTO(cleanup_bulk, rc = -ENOMEM);
574 spin_lock(&request->rq_lock);
575 /* If the MD attach succeeds, there _will_ be a reply_in callback */
576 request->rq_receiving_reply = !noreply;
577 /* We are responsible for unlinking the reply buffer */
578 request->rq_must_unlink = !noreply;
579 /* Clear any flags that may be present from previous sends. */
580 request->rq_replied = 0;
582 request->rq_timedout = 0;
583 request->rq_net_err = 0;
584 request->rq_resend = 0;
585 request->rq_restart = 0;
586 request->rq_reply_truncate = 0;
587 spin_unlock(&request->rq_lock);
590 reply_md.start = request->rq_repbuf;
591 reply_md.length = request->rq_repbuf_len;
592 /* Allow multiple early replies */
593 reply_md.threshold = LNET_MD_THRESH_INF;
594 /* Manage remote for early replies */
595 reply_md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT |
596 LNET_MD_MANAGE_REMOTE |
597 LNET_MD_TRUNCATE; /* allow to make EOVERFLOW error */;
598 reply_md.user_ptr = &request->rq_reply_cbid;
599 reply_md.eq_handle = ptlrpc_eq_h;
601 /* We must see the unlink callback to unset rq_must_unlink,
602 so we can't auto-unlink */
603 rc = LNetMDAttach(reply_me_h, reply_md, LNET_RETAIN,
604 &request->rq_reply_md_h);
606 CERROR("LNetMDAttach failed: %d\n", rc);
607 LASSERT (rc == -ENOMEM);
608 spin_lock(&request->rq_lock);
609 /* ...but the MD attach didn't succeed... */
610 request->rq_receiving_reply = 0;
611 spin_unlock(&request->rq_lock);
612 GOTO(cleanup_me, rc = -ENOMEM);
615 CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
617 request->rq_repbuf_len, request->rq_xid,
618 request->rq_reply_portal);
621 /* add references on request for request_out_callback */
622 ptlrpc_request_addref(request);
623 if (obd->obd_svc_stats != NULL)
624 lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
625 atomic_read(&request->rq_import->imp_inflight));
627 OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5);
629 do_gettimeofday(&request->rq_arrival_time);
630 request->rq_sent = cfs_time_current_sec();
631 /* We give the server rq_timeout secs to process the req, and
632 add the network latency for our local timeout. */
633 request->rq_deadline = request->rq_sent + request->rq_timeout +
634 ptlrpc_at_get_net_latency(request);
636 ptlrpc_pinger_sending_on_import(request->rq_import);
638 DEBUG_REQ(D_INFO, request, "send flg=%x",
639 lustre_msg_get_flags(request->rq_reqmsg));
640 rc = ptl_send_buf(&request->rq_req_md_h,
641 request->rq_reqbuf, request->rq_reqdata_len,
642 LNET_NOACK_REQ, &request->rq_req_cbid,
644 request->rq_request_portal,
649 ptlrpc_req_finished(request);
654 /* MEUnlink is safe; the PUT didn't even get off the ground, and
655 * nobody apart from the PUT's target has the right nid+XID to
656 * access the reply buffer. */
657 rc2 = LNetMEUnlink(reply_me_h);
659 /* UNLINKED callback called synchronously */
660 LASSERT(!request->rq_receiving_reply);
663 /* We do sync unlink here as there was no real transfer here so
664 * the chance to have long unlink to sluggish net is smaller here. */
665 ptlrpc_unregister_bulk(request, 0);
667 if (request->rq_memalloc)
668 cfs_memory_pressure_restore(mpflag);
671 EXPORT_SYMBOL(ptl_send_rpc);
674 * Register request buffer descriptor for request receiving.
676 int ptlrpc_register_rqbd(struct ptlrpc_request_buffer_desc *rqbd)
678 struct ptlrpc_service *service = rqbd->rqbd_svcpt->scp_service;
679 static lnet_process_id_t match_id = {LNET_NID_ANY, LNET_PID_ANY};
682 lnet_handle_me_t me_h;
684 CDEBUG(D_NET, "LNetMEAttach: portal %d\n",
685 service->srv_req_portal);
687 if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_RQBD))
690 /* NB: CPT affinity service should use new LNet flag LNET_INS_LOCAL,
691 * which means buffer can only be attached on local CPT, and LND
692 * threads can find it by grabbing a local lock */
693 rc = LNetMEAttach(service->srv_req_portal,
694 match_id, 0, ~0, LNET_UNLINK,
695 rqbd->rqbd_svcpt->scp_cpt >= 0 ?
696 LNET_INS_LOCAL : LNET_INS_AFTER, &me_h);
698 CERROR("LNetMEAttach failed: %d\n", rc);
702 LASSERT(rqbd->rqbd_refcount == 0);
703 rqbd->rqbd_refcount = 1;
705 md.start = rqbd->rqbd_buffer;
706 md.length = service->srv_buf_size;
707 md.max_size = service->srv_max_req_size;
708 md.threshold = LNET_MD_THRESH_INF;
709 md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT | LNET_MD_MAX_SIZE;
710 md.user_ptr = &rqbd->rqbd_cbid;
711 md.eq_handle = ptlrpc_eq_h;
713 rc = LNetMDAttach(me_h, md, LNET_UNLINK, &rqbd->rqbd_md_h);
717 CERROR("LNetMDAttach failed: %d; \n", rc);
718 LASSERT (rc == -ENOMEM);
719 rc = LNetMEUnlink (me_h);
721 rqbd->rqbd_refcount = 0;